[dsr_]

Seems reasonable that there could be 6000 or so Icelandic speakers outside Iceland.

[astrodust]

Many live and work abroad, plus there's several pockets of Icelanders in various countries, like one notable group in Western Canada as you'd see in places like Gimli, Manitoba: https://en.wikipedia.org/wiki/Gimli,_Manitoba

It's not clear how many still speak Icelandic, but there's heritage.

https://en.wikipedia.org/wiki/Icelandic_Canadians